CVE-2026-52912netfilter: nf_queue: hold bridge skb->dev while queued
Updated under an hour ago ()
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It affects Linux and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ac28634456867b23b95faccba7997a62ec430603 before 950d809f154dca04e5fbe5d3c8b9c5e44769cd57; from ac28634456867b23b95faccba7997a62ec430603 before a698ac8ab2561cf575d2d9f34095032651dd952e; from ac28634456867b23b95faccba7997a62ec430603 before 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac; from ac28634456867b23b95faccba7997a62ec430603 before 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be; from ac28634456867b23b95faccba7997a62ec430603 before 3823c27099cfe2482299065814adbaa771be9644; from ac28634456867b23b95faccba7997a62ec430603 before 15d464265120ab9818bd673af301deee09bedab2; from ac28634456867b23b95faccba7997a62ec430603 before 3fb0f5c0f64162a8c3f25616a4f1e340b921737f; from ac28634456867b23b95faccba7997a62ec430603 before e196115ec330a18de415bdb9f5071aa9f08e53ce | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.7 before 5.10.259; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57patch
- https://git.kernel.org/stable/c/a698ac8ab2561cf575d2d9f34095032651dd952epatch
- https://git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75acpatch
- https://git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3bepatch
- https://git.kernel.org/stable/c/3823c27099cfe2482299065814adbaa771be9644patch
- https://git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2patch
- https://git.kernel.org/stable/c/3fb0f5c0f64162a8c3f25616a4f1e340b921737fpatch
- https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53cepatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.